Bump codecov/codecov-action from 5 to 6 (#233)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -80,7 +80,7 @@ jobs:
         COLOR: 'yes'
     - run: python -m coverage xml
     - name: Upload coverage
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
       with:
         fail_ci_if_error: true
         token: ${{ secrets.CODECOV_TOKEN }}